Methods are described for the isolation of humaic substances from a soil samples. The produres and based on extractions with sodium hydroxide or sodium pyrophosphate. Four of the humic samples were dried and then analysed by thermal neutron activation analysis. The humic samples along with three standard rocks were irradiated for 15 hours in a flux of 1012 n·cm–2·s–1. Counting was carried out using both a large volume Ge(Li) detector and a high resolution LEP detertor. Quantitative analysis was based on the known element concentrations in the standard rocks. The elements determined were Sc, Cr, Fe, Co, As, Se, Br, Mo, Sb, La, Ce, Eu, Hf, Ta, Th, and U. concentrations ranged from 0.02 ppm (La) to 7900 ppm (Fe).
Authors:K. Heide, K. Gerth, G. Büchel, and E. Hartmann
Detailed studies of the gas release profiles of minerals and rocks reveal differences in the degassing rates and degassing temperatures and also in the compositions of the fluids evolved from the samples.
Authors:V. Psota, E. Lukšíčková, J. Ehrenbergerová, and J. Hartmann
The occurrence of damaged grains was studied in 12 barley genotypes in a three-year period. The occurrence of grains with physiological split of lemma and endosperm was generally low. Split of palea and endosperm was mostly affected by the genotype (10%) and it was recorded most frequently in the genotype Heris. Incomplete overlapping of husks was also markedly affected by the genotype (10%) and it occurred most frequently in the genotype Scarlett. Sprouted grains and grains of green color occurred minimally. Black points were affected by year (21%) and genotype (15%). This damage was most frequently reported for the genotypes Camera and Jersey. Surprisingly, the occurrence of grains with apparently moldy husks was markedly affected by the genotype (25%), less substantially by the location (10%) and minimally by year (3%).
Authors:Veronika Kozma, Gy. Végső, P. Á. Deák, E. Hartmann, A. Németh, Sz. Török, R. Langer, and A. Doros
Kidney neoplasms can occur after kidney transplantation in low percentage. In this report we delineate a rare case of neoplasm in the transplanted kidney detected on screening ultrasonographic examination. Due to the intercalyceal location of the tumor percutaneous radiofrequency ablation was planned with continuous cooling the collecting system avoiding the thermal damage. To the best of our knowledge this method has never been reported applying in transplanted kidney. The two-month CT follow-up verified no residual tumor and the kidney function remained in normal range during this period. These facts imply that the method can be safely applied.
Authors:F. Poineau, E. Rodriguez, P. Weck, A. Sattelberger, P. Forster, T. Hartmann, E. Mausolf, G. Silva, G. Jarvinen, A. Cheetham, and Kenneth Czerwinski
The chemistry of technetium is being explored at the University of Nevada Las Vegas. Our goal is to investigate both the applied
and fundamental aspects of technetium chemistry, with a special emphasis on synthesis, separations, and materials science.
The synthetic chemistry focuses on metal–metal multiple bonding, oxides and halides. Synthesis and characterizations of (n-Bu4N)2Tc2X8, Tc2(O2CCH3)4X2 (X = Cl, Br), TcO2, Bi2Tc2O7, Bi3TcO8, TcBr3 and TcBr4 have been performed. The applied chemistry is related to the behavior of Tc in the UREX process. Separation of U/Tc has been
conducted using anion exchange resin and metallic Tc waste form synthesized and characterized.
Authors:A. Doros, B. Nemes, Z. Máthé, A. Németh, E. Hartmann, Á. P. Deák, Zs. F. Lénárd, D. Görög, I. Fehérvári, Zs. Gerlei, J. Fazakas, Sz. Tóth, and L. Kóbori
Hepatic artery complication represents recognized sequel of liver transplantation that carries significant morbidity and mortality. Besides retransplantation, hepatic artery recanalization is provided surgically, or by percutaneous angioplasty and stent placement. This study provides an analysis of a single center experience comparing surgical and interventional treatments in cases of early hepatic artery complications.
In this retrospective single center study, 25 of 365 liver transplant recipients were enrolled who developed early hepatic artery complication after transplantation. Percutaneous intervention was performed in 10 cases, while surgical therapy in 15 cases. Mean follow-up time was not different between the groups (505±377 vs. 706±940 days, respectively).
6 patients in the Intervention Group and 10 patients in the Surgery Group are alive. The retransplantation rate (1 and 3) was lower after interventional procedures, while the development of biliary complications was higher. The mortality rate was higher after operative treatment (2 and 5).
Interventional therapy is a feasible and safe technique for treatment of early hepatic artery complication after transplantation. Being less invasive it is an invaluable alternative treatment having results comparable to surgical methods.
Authors:E. Hartmann, A. Németh, Gy. Juharosi, Zs. Lénárd, P. Á. Deák, V. Kozma, P. Nagy, Zs. Gerlei, I. Fehérvári, B. Nemes, D. Görög, J. Fazakas, L. Kóbori, and A. Doros
Hepatocellular carcinoma, which has developed in liver cirrhosis is a disease where liver transplantation can provide a cure both for the tumour and the underlying liver damage. However, patients can only be transplanted when the tumour number and size do not exceed the Milan criteria. Tumour ablation methods — such as radiofrequency ablation — can provide a chance to make the patient eligible for transplantation. Among the 416 Hungarian liver transplanted patients there are 6 who had received different types of ablative therapy as bridging therapy in different institutions. On the basis of analysis of the patients' data we created a guideline for the treatment of cirrhotic patients with hepatocellular carcinoma with the aim of developing a uniform Hungarian approach.